Valve for pumping-engines.



No. 664,||4. Patented Deb; la, mom

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VALVE FRv PUMPING ENGINES.

' (Application led May 26, 1900.)

2 Shams-Sheet |l (No Model.)

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A TTORNEYS No. 664,||4. Patented bec. la, |900.

.1. s. ATKINSON.

Y VALVE FOR PUMPING ENGINES;

.(Applictionled May 26, 1900.)

2 Sheets-Sheet 2.

(No Model.)

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ATTORNEYS x vins ce, moraumo.. WASHINGTON. u. c.

1 "UNI'ijgED y STATES' PATENT FEICE.

JAMES SEBBOEN ATKINSON, OE LOUISVILLE, KENTUOKY, ASSIGNOE OE ONE- FOURTHTO WILLIAM O. ATKINSON,- OE NASHVILLE, TENNESSEE.

vLvE FOR PuMPINe-ENGINES.

SPECIFIGATIGN forming` part of Letters Patent No. 664,114, datedDecember 18, 1900.

Applicatidn I'iled May 26, 1900. Serial No. 18,075. (No model.)

To all whom it may concern: a, respectively, and the main exhaust cavi-Be it known that I, JAMES SEBBORN ATKIN- ties or grooves 9, (see Figs. 2and 4,) which SON, residing at Louisville, in the county of are formedin the valve-seat andleadtotheexA Jefferson and State of Kentucky,have.inhaust-nozzle 7. Thus at each endwise move- 55 5 vented a new anduseful Improvement in ment of the valve E one of the grooves or Valvesfor Pumping-Engines, of which the spaces 6 6a coincides with one of themain following is a specification. ports 5 5a, so that exhaust takesplace from My invention is an vimprovement in autothe nozzle in the sideof the steam-chest. matic valve attachments for pumping-en- Thesmallpassages 8 S'f, which appear as 6o Io gines. mere grooves or depressionsin the face of the The details of construction, arrangement, part G,conduct steam from the piston-cylincombination, and operation of partsare herede-r B to the ends of the steam-chest and coninafter describedwith reference to the acnect with the former at points which are alitcompanying drawings, in whichtle to one side of the center, as shownin Fig. l. 65

Figure lis a central longitudinal section of They are curved, (see Fig.4,) so as to pass the steam or motor portion of my pump. Fig. around thecombined inlet and exhaust pas- 2 is a vertical section of the Same online 2 2, sages v5 5a. Fig. l. Fig. 3 is a perspective view of the AAsemicircular groove 9 (see Fig. 3) is steam chest and its baseplate.Fig. 4 is a formed in the under side of the bed-plate F 7o zoperspective View of the piston-cylinder. Fig. of the steam-chest D, andthis communicates 5 isaperspective View of the automatic valve. at itscenter with the port 9, (see Figs. 2 and The piston Aof the engine,which is adapt- 4,) that leads to exhaust-nozzle '7. The side ed toreciprocate in the cylinder B, is of the portions of groove9 communicatealternately trunk type and has a slightly-greater length with ports 5 5ato allow exhaust at one or the 75 than the stroke of the pump, withwhich itis other end of the cylinder B at each half-rein practiceconnected byr the rod C in the ciprocation ofthe piston A. usual way.The formation of the passages 8, 8a, and 9 The steam-chest D and itscontained valve as grooves or depressions in the face G effects E arecylindrical in form, and the chest is ara considerable economy in theconstruction of 8o 3o ranged parallel with the side of the piston' theengine as compared' with cored castings, cylinder A, to which it isbolted. The valvewhich often prove defective and are therefore chest Dhas a dat bed or bed-plate F, (see worthless. Fig. 3,) which is adaptedto t upon the flat. .From the foregoing description the operatop G ofthe piston-cylinder B; (See Figs. 2 tion of the valve E may now beunderstood. 85 and 4.) The valve E has a central chamber As shown inFig. l, the piston A has coml, to which live steam has constant accesspleted its movement to the right and the leftthrough a side and top port2 and the coincihand end of the cylinder B has exhausted dent butnarrower one 3 in the chest D. Said Athrough the communicating passage5, while chamber has two ports 4 4iL on the under side, steam has alsopassed through the left-hand 9o 4o which as the valve E shiftsalternately regispassage or port 8 and acted on the left-hand ter withthe long and curved induction and end of the valve E, and thus shiftedit also to exhaust ports 5 5a, leading in opposite directhe right, andlive steam is being admitted to tions to the ends of piston-cylinder B.the right-hand end of cylinderBfrom the cen- The valve E is providedwith circumferentral valve-chamber l through the right-hand 95 tialchambers or grooves 6 a between each passage 5, so that the nextmovement of the of its ends and the central chamber 1, such piston Awill be from right to left, whereupon grooves forming steam spaces orpassages the right-hand passage 8a to steam-chest D that servealternately for exhaust-ports as will be uncoveredandsteamtherebyadmitted the valve reciprocates. In other words, said to act onthe nearest or right-hand end of the Ioo 5o grooves or passages 66alternately establish valve E and shift it to the left. By thisopcommunication between the passages 5 and eration the port 4 in valve Ewill no longer 'communicate with the right-hand passage 5, leading tothe right-hand end of cylinder B, but communication will be establishedbetween said passage and the exhaust. Thus the piston-valve E actsautomatically to allow alternate induction and exhaust of steam to andfrom the piston-cylinder through the same passages and is itself actedon by live steam, and thereby shifted at each half-reciprocation ofthepiston A, so as to cut 01T steam at the right moment.

The steam which acts on and actuates the valve A may be allowed toexhaust through the main passages 5 5, by which it entered the cylinderB; but to make sure provision for thorough exhaust ports 10, Figs. l and2, are formed in the valve-seat, the same extending horizontally toconnect with the main exhaust cavities or grooves 9. The said ports arelocated such distance from the ends ofthe valve-chamber that the valve Euncovers and opens them alternately as it reaches the limit of itsstroke.

To prevent the valve E turning or rotating about its axis, I provide arectilinear guide for the same by means of a screw l1, Fig. 2, whichpasses through the side of the steamchest D, its smooth or threadlessend projecting into a longitudinal slot 12, Fig. l, in the side andcentral portion of the valve.

In case the engine is used vertically I provide means forcounterbalancing the weight of the valve, so that it may not dropprematurely by gravity, and for this purpose the valve E may have a rodor small stem projectcd through the upper end of the steamchest andworking in a stuing-box having the usual form of gland, by whichfriction on the said stem may be regulated as required to overcome theeect of gravity.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. The combination with a cylinder-piston, and steam-chest andintermediate exhaustpassages ot` a valve adapted to reciprocate in thesteam-chest, and having a central cham- (S-Lilli ber provided with aninduction-port on one` side and two eduction-ports on the other, andalso with grooves or exhaust-ports located laterally from said chamber,passages each com steam-chest and valve having a central portedcham berand lateral exhaust-spaces, of combined induction and exhaust passages,exhaust-ports that communicate with the latter as the valvereciprocates, two small passages conducting livey steam to ends ofsteamchest, and supplemental exhaust-ports 10, which extend from thespaces formed alternately at ends of valve-chamber to the mainexhaust-passages, as shown and described.

3. The valve and steam-chest having a flat base provided with centraland end ports and a curved exhaustpassage 9, formed as a groove ordepression in said base, and the piston and cylinder having a flat topprovided with the steam-passages 5, 5a, 9, and 8, 8*, a portion of thelatter being formed as grooves extended in the flat top, the saidpassages bcing arranged to coincide and communicate with those of thesteam-chest base, substantially as shown and described.

4. The combination, with the steam-chest having a cylindrical chamber,ofa cylindrical valve, and a lateral guide fixed on the steamchest thesame working in a guide-cavity in the valve to prevent rotation,substantially as shown and described.

JAMES SEBBORN ATKINSON.

Witnesses DANIEL WEBER, PETER NEWFIELD.

